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  • PCW
  • PCW's Avatar
02 Jul 2025 23:20 - 02 Jul 2025 23:22

7i92M very weird communication problem!!!

Category: Installing LinuxCNC

--- 10.10.10.10 ping statistics ---
60000 packets transmitted, 60000 received, 0% packet loss, time 60420ms
rtt min/avg/max/mdev = 0.057/0.276/16.993/0.227 ms, pipe 2

OK that (almost 17 ms) is the issue.

Depending on the Ethernet hardware on the host, solutions are:

If it's a Realtek MAC, install the DKMS driver

Disable PCIE/Ethernet power management

Make sure all power management is disabled in the BIOS
It that's not good enough, pin the Ethernet IRQ to the last processor
and use isolcpus in the kernel command line.

Here's a long  thread on solutions to this issue:

forum.linuxcnc.org/18-computer/56380-error-finishing-read-sigh
 
  • ANGELOS13
  • ANGELOS13
02 Jul 2025 22:56
Replied by ANGELOS13 on topic 7i92M very weird communication problem!!!

7i92M very weird communication problem!!!

Category: Installing LinuxCNC

--- 10.10.10.10 ping statistics ---
60000 packets transmitted, 60000 received, 0% packet loss, time 60420ms
rtt min/avg/max/mdev = 0.057/0.276/16.993/0.227 ms, pipe 2
  • PCW
  • PCW's Avatar
02 Jul 2025 22:09 - 02 Jul 2025 22:10

7i92M very weird communication problem!!!

Category: Installing LinuxCNC

OK, so there is a real time issue that needs to be addressed
before LinuxCNC will run on that system.

To get a rough idea of network latency:

sudo chrt 99 ping -i .001 -q -c 60000 10.10.10.10

This will run for a minute and then print statistics.
  • Benb
  • Benb's Avatar
02 Jul 2025 21:41
  • ANGELOS13
  • ANGELOS13
02 Jul 2025 21:36
Replied by ANGELOS13 on topic 7i92M very weird communication problem!!!

7i92M very weird communication problem!!!

Category: Installing LinuxCNC

Linuxcnc is running, the light on the rj45 stays solid green and the lights on the board stay solid without any activity.   
  • PCW
  • PCW's Avatar
02 Jul 2025 21:31
Replied by PCW on topic Configuración thcad2 con mesa 7i96s

Configuración thcad2 con mesa 7i96s

Category: General LinuxCNC Questions

The THCAD support was added to pncconf about 3 years ago so definitely in 2.9.4

The THCAD screen should appear on the next screen after the one where
you set the stepgen/encoder functions.
  • Johnnysacalu
  • Johnnysacalu
02 Jul 2025 21:06
Replied by Johnnysacalu on topic Configuración thcad2 con mesa 7i96s

Configuración thcad2 con mesa 7i96s

Category: General LinuxCNC Questions




he vuelto a instalar linuxcnc ultima version estable y nada sigue sin darme la option del thc
porque¿
  • PCW
  • PCW's Avatar
02 Jul 2025 21:05 - 02 Jul 2025 22:16

homing with Phase Z encoder on MESA 7i96s

Category: Advanced Configuration

The search velocity is the speed when searching for the first
home switch actuation, the latch velocity is the velocity used
for for the actual homing switch/index move so only the latching
velocity is needed in this case.

Basically, Index-only homing is specified by setting the search
velocity to 0. (as the homing documentation specifies)
  • unknown
  • unknown
02 Jul 2025 20:40
Replied by unknown on topic Bios error during lcnc start

Bios error during lcnc start

Category: Computers and Hardware

Seems to be a commonly found issue, HP support forums discuss this quite a bit with various cards.
Might be an idea to google your issue, TLP poisoned, and see if there are any solutions. I wouldn't mention a specific card in your searches to begin with.
My first thought was if the card wasn't on a "whitelist" the PC may refuse to play ball .
  • PCW
  • PCW's Avatar
02 Jul 2025 20:20

MESA 7i76U inputs changing state without changes to config

Category: Basic Configuration

7I76U inputs are always sinking so normal connection would be:

+24V --> SWITCH --> 7I76U input

If you look in halshow, hm2_5i25.0.7i76.0.0.input-07 will always be
in the opposite state as hm2_5i25.0.7i76.0.0.input-07-not, so choosing
one or the other should make a difference.
  • scsmith1451
  • scsmith1451's Avatar
02 Jul 2025 19:49

MESA 7i76U inputs changing state without changes to config

Category: Basic Configuration

Well, that didn't work. Inputs are back to sinking inputs as specified in the manual. I did comment out the PROBE input so it is not currently part of the configuration. However, on startup LCNC continues to show the EStop button activated so I cannot continue testing Homing.

Unable to continue at testing at this point.

These are the states of the inputs at this time:

 

And this is my HAL config:

 

File Attachment:

File Name: my_TestMill.hal
File Size:12 KB


Any help would be greatly appreciated.
  • JackRay
  • JackRay
02 Jul 2025 19:34
Replied by JackRay on topic homing with Phase Z encoder on MESA 7i96s

homing with Phase Z encoder on MESA 7i96s

Category: Advanced Configuration

ok, I understood that, but how will my axis move if I don't give any speed? it will never detect my plus Z. I can't understand the logic ☺
  • PCW
  • PCW's Avatar
02 Jul 2025 19:34

7i92M very weird communication problem!!!

Category: Installing LinuxCNC

If there was no communication, LinuxCNC should exit.

Are you saying LinuxCNC is running but you have no activity light
(green LED on 7I92 RJ45)?

What does:

ip a

report when in this state?
  • mariomatix@yahoo.de
  • mariomatix@yahoo.de
02 Jul 2025 19:33

Entwickler für eine Programmierung einer angepassten CNC Software auf LinuxCNC

Category: Deutsch

Hallo Herr Jansen,

ich habe Ihnen unter This email address is being protected from spambots. You need JavaScript enabled to view it. eine E-Mail gesendet.

Mfg Mario Gnad
  • Doc_emmet
  • Doc_emmet
02 Jul 2025 18:58 - 02 Jul 2025 19:01
Read value or file in G-code was created by Doc_emmet

Read value or file in G-code

Category: G&M Codes

Hello, I want to use QtDragon to determine the tool height using Utils - Workpiece and then save the result so that I can access the value in the G-code. My idea was to save the result to a file, which also works by slightly modifying the auto_height.py file. I added the following line:

def show_result(self, data):
        diff = float(data) - float(data)
        self.lineEdit_height.setText(format(diff, '.3f'))
        # New line by me:
        with open('/home/dg/linuxcnc/nc_files/probe_height.txt', 'w') as f: f.write(str(diff))

But how can I access the value stored in the probe_height file in a measurement routine.ngc, or can I save the measured value directly in
the G-coder as a variable, e.g., #5000
 
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